Azo dye.



iinrlrnn OTTO SCHMIDT, OF MANNHEIM, GERMANY, ASSIGNOR TO BADISCHE ANILIN & SDDA FABRIK, OF LUDWIGSHAFEN-ON-THE-RHINE. GERMANY, A GGRPOEATION 0F Patented Get. 12, 1999.

GERMANY.

AZQ DYE.

936,951. Specification of Letters Patent.

No Drawing.

To all whom it may concern;

Be it known that I, ()T'ro Scinrurr, doctor of philosophy and chemist, subject of thtrj uct thereof and which possess a constituthm probably corresponding to the formula \\Y V soni in which X represents the benzoyl, or snbstituted benzoyl, residue, upon being (liazotized and combined with .l.; )'lltll)llllll.ll-7llitonic acid, or with 1.3.(3-naphthchdisnl tonic acid, or 2.3.G-naplithol-disultonic acid, or

with 1.3.6.8-naphtliol-trisnll'onio acid, give rise to coloring matters which are eminently suitable for use in the form of their lttlttH. As instances of substituted benrioyl componnds which can be used in the prcparath .1 of the benzoyl'paraphenylene-diamin-mono-- suli'onic acid ctnnpoumls which are em ployed according to my invention, l. men tion the. ortho, meta-, and para-nitrolnmzoyl chlorids' and the cl'ilorbenzoyl chhn'ids.

My new colorii matters produced nocording to this invention are, in the form of their sodiun't salts, soluble in water, in the form of their lakes they possess from Bordeaux-rcd to violet-red shades and are extremely fast? against the action of light; on reduction with tin and hydrochloric acid they give rise on the one hand to an aniino naphthol-s'ulfonic acid, and on the other hand to a benzoyl-para-phe 1ylenc-diaminn1onosult'onic acid compound. The new coloring matter which I desire to be understood as claiming ,s 'iecifieally is that obtainable by combining diazotized orthochlor-benzoylpara-phenylenediamiinnuuiosultonic acid With 2.3.(S-naphthol-disulfonic acid. In the form of its lakes it possesses a Bordeaux-red color and on reduction with tin and hydrochloric acid gives rise to 1.2-5:rhino-naphthol-3.6-disulfonic acid and ortho-chlor- Application filed Mlfy 22, 1909. Serial No. 497,753.

benzoyl para phenylene diamin -n'1on0sultonic acid.

The following example will serve to illustrate 'lnrther the .n: tilt": of my inrcntion and how it can be pcriorincd, but the invention is not (:(Hllfiitztti to this example. The parts are by weight. Dissolvethirty-one and two tilths parts of the sodium salt of benzoylpara-phenylenc-diamin SttlIliOlllt', acid and seven parts of sodium nitrite in one thou sand parts of water, and allow this solution to run, while stirring, into a mixture of HEY?!) hundred and titty parts of ice and thirty parts of thirty-two er cent. hydrocbloric acid.

Stir jt'ol one hour, then filter oil the diazo compound which has separated out and introduce it into a solution of thirtyfour and it'our-lilths parts of the di-soditnn salt of 1.3.6-naphtlml-disultonic acid, to which sullicient sodium carbonate has been added to maintain the whole alkaline. \r'hen, from a test portion, no diam conipound is found to be present, neutralize the mixture with acetic acid. heat to from sev cnty. to seventydivc, degrees ccntigradc, and necipitate the coloring; matter by means ot common salt. in a similarmanner, instead o't. benzoylurailienyleuediamin-sultonic acid, its derivatives which are suhsth tutrd in the bcnzoyl ring. can be employed, and instead of liMS-naphthol disuliionic, acid. any one ol the other ahumane!itioned in:phthohsultonic acids can he. used, and the rot-responding coloring matters be obtained.

Now what i claim l. The alto coloring; matters obtainable by (fottlblliitltl a diazotihed benzoyl-pa ra-phenylene-- 'lian1in-monosuli'onic acid con'iponnd \\ith a na 'ilitholsullonit: acid. in which position 3' is substituted by a sull'onie acid group, which coloring matters are, in the form 01' their sodium salts soluble in water, in the form of their lttl-itH possess from lior deaun red to violet-red shades which are cf\'- tremely 'last a ainst tl action o'lf light, on

reduction with tin and hydrochloric acid give rise on the one hand to an amino-naphthol-snlton' acid and on the other hand to a benzoyl para phenylene diamin-monosultonic acid compound.

The azo coloring matter obtainalnc by combining diazot' ized ortho-chlor-benzoylpara phenyleuw diamin nionosul tonic acid on reduction with tin and hydrochloric acid with maphthol disulfonic acid, which In testimony whereof I have hereunto set coloring matter in the form of its sodium my hand in the presence of two subscribing 10 salt, is soluble in water, and in the form of wltnesses.

its lakes possesses a Bordeaux-red color and OTTO SCHMIDT fonic acid and ort'no ch10]: benzoyl para- J. ALEc. LLOYD,

gives rise to 1.52-amino-rmphthol-i? .6-disul- VVitncses: phenylene-diamin-monosnlfonic acid. l H. SHANE. 

